---
id: CVE-2025-69225
title: AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python
summary: >-
  AIOHTTP is an asynchronous HTTP client/server framework for asyncio and
  Python. Versions 3.13.2 and below contain parser logic which allows non-ASCII
  decimals to be present in the Range header. There is no known impact, but
  there is the …
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-444
vendor: aiohttp
product: aiohttp
affected:
  - aiohttp < 3.13.3
patched:
  - aiohttp 3.13.3
published: '2026-01-06'
updated: '2026-10-11'
sourceUpdated: '2026-10-11T20:10:00.200'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-69225'
references:
  - url: >-
      https://github.com/aio-libs/aiohttp/commit/c7b7a044f88c71cefda95ec75cdcfaa4792b3b96
    label: security-advisories@github.com
  - url: >-
      https://github.com/aio-libs/aiohttp/security/advisories/GHSA-mqqc-3gqh-h2x8
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-69225'
  - url: 'https://github.com/aio-libs/aiohttp'
tags:
  - nvd
  - osv
  - pip
epss: 0.00282
epssPercentile: 0.20611
aliases:
  - GHSA-mqqc-3gqh-h2x8
  - PYSEC-2026-1109
ecosystem: pip
ingestedAt: '2026-07-08T18:25:51.425Z'
---

## Overview

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below contain parser logic which allows non-ASCII decimals to be present in the Range header. There is no known impact, but there is the possibility that there's a method to exploit a request smuggling vulnerability. This issue is fixed in version 3.13.3.

## Affected

- `aiohttp < 3.13.3`

## Remediation

Upgrade past the affected range:

- `aiohttp 3.13.3`

## Package advisory (CVE-2025-69225)

Affected packages:

- `aiohttp < 3.13.3`

Patched in:

- `aiohttp 3.13.3`

Source: https://osv.dev/vulnerability/GHSA-mqqc-3gqh-h2x8